Telephone exchanger



FIG. 1 is a left side, top and front perspective view of a telephone exchanger showing my new design in cradled relationship;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof. 

An ornamental design for telephone exchanger, as shown and described. 